Explosive-charge placer



Ang. 1s, 1925. 1,549,194

' E. H. PALMER EXPLOSIVE CHARGE PLACER FL-lexd Jan. 24. 1924 .Y `Pateniced Aug. 181,` 1,925. s if. l w

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' y' nxPLosrvn-cnenen rLAcER.

Application alea anaa'rj 24', 1924. seriaruo. 688,220.

y j i f'To/llwhomitmay concern: Y i :Be it kno "n that I, EDMON'D H.. PALMER," 'a' citizen `of the. United States, residing, at

Sanford, in ,the county of Seminole vand Stateoi Florida,A have invented certain new 'andhtus'eful improvements in' liaplosive- VChar e Placers, of 'whzch'the following Lis a speci cation. Y I' 1 iinvention relates Vtofa .device for placing an eXplos/ivecharge inthe ground.V Y l f O1#diilarllv; Suche 'Charges are' drppedj y vdovvn'rnja hole' bored in the ground and.

' `Ipushedtothe.bottomrloy means of a tamping .'ro'd; @This method is liable 'to cause tearing "or'injnry to the cartridge and might'ev'en be k'ftkln-i cause of serious accidents asfthe'rcharge bj'ectof kthe invention r,is .to fhfurnish lushejd down f in fthe secured inthe chamber formed in the head ing the charge and ther ignition cap is" now Aleft-in the'ground and the pipe'vvithdravvn.. '307; In the accompanying, one embodiment of Athe invention is illustrated, 'andf z L VFigure 1 represents an axial section of the' ia-2 fr" 1.2

,375 o lgure f device;

Figure 2 .a transversev section along line In the drawing, y'reference numeral 10 rep jresents the explosive charge or cartridge f Whichis usually enclosed in a bag. Refer-V encernumeral 11 'represents the ignition l'cap lplaced at the upper end of the cartridge and connected with a pair of electric conductorsY 12 by meansfofvvhich thel 'chargeis exploded. -The Vcartridge 10y is enclosed ina plugorV A head 13 4preferablymade of Wood or similar kfibrous material and having square or other 1 polygonal cross section. Y The cap is pointed at its lower end, as at 14, in order to easily penetrate vthe lground andthe sharp v`edges 415 ofthel cap are'nicl'zed toprovide upwardly` f-*directed .teethl or barbs., These barbs "are, intendedto grip. the ground andV prevent' yretraction of the head after itihas-been inserted in the ground. The head has acliain-f ber 16 of a size suitable to contain the car? tridge'10 and at the upperend of the chamber an annular shoulder 1'?y is cut in the wall i and; concentric therewith. 'Illia shoulder 17 Ein'. which@ Qartridgecanbe placed vand*Whichhead-'lli Y gronldfto the, correcltfidepth bvmcans of' a .longfpip'ef With the'headf and pipe'lthus`V` positioned the cartridge Withthe ignition cap ''f attached'-'isdropped-through*the pipe and f by means of a tamping` rod.; vThe head holdforms 'a seat for the loWerjenjd'of-a metallic pipe 18 which fits snugly in the seat lfso as' to temporarily hold'thehead Wheninserted -1n rv'the ground. Y' This pipek is of--Suficient length to reach up 'above the'groundand has d an 'inner diametery substantially the. saine or ysomewhat larger than the diameterq lof th@ Y .chamberfl Y f s i After Vthe head 13 ,andrfleriref'lf are; I "pl'aced 1n theground, thecartridge is -posi- Y i tioned in the chamber 16 togetherwiththeig'-` 5 n ition cap `11-by dropping them through the p1pe'18. The conductorsare-held onroppo'- VsiteV sidesof the"V tube 18and' a cylindrical the lWad can 'ibefipushed fdovvnjfinthe Vpipe pipe"A :18 and *pack the Wadi tightly =overathe "cap'll Vin the upper 'end of the cartridge 10 to yretain the same in position in thegheadl'. As the'cartridge does not comein directV contact With the ground there is no dangerr of itvbeingiinjured,vthe head being` previ- {ionsly vpushedv down` in the.r ground by .hamf j mering on theupper' endof-the pipe 18 Vun'- I til theVdesired-,depth is reached.' 'Ihe'down-V 'gvvard- Vpressure from Vthe ,hammeringon` the vtube4 is directly communicated to the head'18 '9c Y l through the shoulder 17. `VThe tamping rod 2O having been previously removed, the pipe 18 is thereupon turned inl its seat 17. f VThe.

square sectional shape. of the head 2O "wilh v 1 Y 9.5'

then prevent the turning of the head in the ground-and after the pipe has Ybeenfsujiciently loosened in .its'seat it may be Wthdrawn', leaving theV head With the. charge in;V j i position, ythe barbs or teeth 15 assisting v in retainingthe head in the ground,` and the cap and conductors being held in the head by the Wad 19. iThe hole in the groundcan n i i 'y l now ,bef filled While the upper ends ofthev conductors 12 are connected WithV anjele'c-`l v v 105 theV invention,-jV

tric battery and the chargeexploded'.. 7 Havingthus described l what is claimed'as'nevv is:` f

Y1. An explosive charge placer k.comprisf-V T-rfi; ing a headof polygonal cross sectionfand provided With la cylindricalchamber adapt-v ed to receivea cartridge, a seat bein formed, in said headl above the chambero, gr-eatery( diameter than the chamber, and a tubular member adapted to engage in the seat to carry said head, said head being provided with a pyramidic spear point at its forward end and its sharp side edges being nicked to provide rearwardly directed teeth.

2. An explosive charge placer comprising a non-metallic head of polygonal cross section and provided with a cylindrical chamber adapted to receive a cartridge, a seat being formed in the head above said chamber of greater diameter than the chamber, and a tubular member adapted to engage in the seat tocarry the head, said head being provided with a pyramidic .spear point at its forward end and its sharp side edges being nicked to provide rearwardly directed teeth, the bore diameter of the tubular member being substantially the same as that of said chamber and its walls having uniform thickness throughout.

3. An explosive charge placer comprising a non-metallic head of square cross section and having a cylindrical chamber adapted to receive a cartridge, an -annular Aseat being formed in the head above the chamber of greater diameter than the chamber, a tubular member adapted to engage inV the seat to carry the head, said head being provided with a pyramidic spear point at its forward end and its sharp side edges being nicked to provide rearwardly directed teeth, the bore diameter of the tubular member being substantially the same as that of said chamber and its side walls having uniform thickness throughout, and u a disc fitting loosely in the bore and provided with longitudinal grooves adapted to receive electric conductors for the ignition cap of said cartridge.

4:. An explosive charge placer comprising a non-metallic head of square cross section and having a cylindrical chamber adapted to receive a cartridge, an annular seat being formed in the head above the chamber of greater diameter than the chamber, a tubular member adapted to engage in the seat to carry the head, said head being provided with a pyramidic spear point at its forward end and its sharp side edges being nicked to provide rearwardly Adirected teeth, the bore diameter of the tubular member being substantially the same as that of said chamber and' its side Walls having uniform thickness throughout, a disc fitting loosely in the bore and provided with longitudinal grooves adapted to receive electric conductors for the ignition cap of said cartridge, and a tamping rod for inserting the cartridge with the ignition cap and the disc into said chamber through the bore of the tubular member, the tamping rod being detachable from the disc.

In testimony whereof affix my signa ture.

p EDMOND H. PALMER. [ns] 

